Locomotive.



No. 633,83l. Patented Sept. 26, I899. N A. elven.

LDCOIOTIVE.

A nmion- Med Aug. 2, 1898.)

(No Modal.) 2 Sheets8heet I.

i l i N 9 I W A TTOHNEYS.

THE norms in! ca. mwurum wunmmml. 0.1.

Orifice...

AtFRED G vEN; o F-nLL'EusB R'e; W SHINGTON;

. LoooM-oTiVE;

SPECIFICATION forming part Letters Tatent NdQ 633,831, dated September26,1899.

Application filed August 2, 1898". se'rni'udiesa'szz; mamas.)

'parts and combinations of the same, as will.

. be fully described hereinafter and then point- IO ed out in the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification,

in which similar characters of reference indi- 'cate corresponding partsin all the figures.

Figure 1 is a side elevation of the invention.

Fig. 2 is a plan view of thesame with the boiler omitted. Fig. 3 is anenlarged transverse section of the improvement snbstan tially on theline 3 3 in Fig. 1, and Fig. 4 is 2o a sectional side elevation of thesame on the line 4 4 in Fig. 3.

The rotary engine is provided with a cylinder A, in which is mounted torotate apiston 13, having two piston-heads B 13*, formed with 25 bucketsB B extending in opposite directions, one piston-head being used fordriving the engine forward and the other for reversing purposes, ashereinafter more fullyd'e-' scribed. The cylinder A when used on alocomotive is mounted transversely on the front truck in the usualmanner, and the shaft 0 of the piston carries onits outer endscrankdisks D D, connected by pitmen E E with the drivers F F of thelocomotive. 7

3 When the steam acts on the buckets B of the head 13', then the rotarymotion given to the piston causes a forward movement of the locomotiveowing to the connectionwith the drivers, as above described but when the0 steam acts on the buckets B of the other p is-' ton-head then thepiston rotates in an opposite direction and thelocomotive backs up.

The cylinder A is provided with two steaminlet ports a, leading to theinterior of the cyl- 4 5 inder into cavities Earranged segmentally onthe inside of the cylinder at or about the middle of the twopiston-heads B B as plainly in dicated in the drawings. The outer en dsof the said ports a are connected with inlet-pipes G G, extending into asmoke box H, and either of said pipes is adapted to be connected by avalve G2 with a steam-supply pipe G extend- .ing-into a dome I, saidpipe containing the usual throttle-valve for regulating theamount ofsteam passing from the dome into the pipe G The cylinder A is alsoprovided with two exhaust-ports c for carrying the exhaust-steam fromthe cylinder-heads B B to exhaust-pipes J J ,'con'taining a valve K andextending in the smoke-box H, as is plainly indicated in the drawings.The valve K has a stem K extending through the smoke-box to the outsideto carry at its outer end an arm K connected by a link K ivith theinterior of the cab, so that the engineer can manipulate the valve K soas to open or close either of the 1 pipes J. or J by turning the saidvalve accordingly. by the engineer from the cab, and for this purposethe Stern G of the valve is provided a link G with the cab to permit theengineer to shift the valve G so as to connect the sup ply-pipe G witheither of the pipes G'or G.

When the several parts are in the position illustrated in the drawings,the pipe G is connected .by the valve G with the pipe G, so that livesteam can pass'from the boiler into the cylinder A to act onthe bucketsof the cylinder-head B to turn the piston B for propelling thelocomotive forward. The

exhaust-pipe J, leading from the cylinder to The valve G is similarlyoperated at its outer end with an arm G connected by V the head B7, isnow opened, while the other pipe J is closed, so that no exhaust-steamcan pass from the smoke-box down the pipe J to act on the buckets B ofthe head B while at the same time a free escape is pro- When it isdesired to reverse the engine, the engineer turns the valve G and thenthe valve K, so as to connect the supply-pipe G with the pipe G and ,tocut off the pipe G from the steam-supply. The valve K closes the pipe Jand opens the pipe J to form an [The exhaust steain from the pipe Jcannot enter the pipe J as the latter is closed, and hence there is noback pressure possible in th'e'cylinder A at the piston-head B.

vided for the exhaust-steam from that part of the cylindercontainingfthe head B.

The cavities Z) extend a suliicient distance 1 respectively for thepistons, a pipe leading around in the cylinder to supply one, two, or ito each feed-port, the pipes being joined to more buckets with themotive agent. The l each other to form a valve-seat and commupiston issuitably packed to avoid leakage of nicating with the steam-supply atsuch point, the motive agent. 1 a valve Working in the valve-seatconnec- Having thus fully described my invention, tions between thevalve and the locomotive- I claim as new and desire to secure by LettersI cab, two exhaust-pipes respectively for the Paten t exhaust-ports, theexhaust-pipes being join ed In a locomotive, the combination with the toeach other to form a valve-seat, a valve smoke-box and truck thereof, ofa rotary en- I mounted in the valve-seat of the exhaustgine-cylindermounted on the truck beneath I pipes and commanding the same, and conl ll the smoke-box, pistons Working in the cylinnections between theexhaust-valve and the (ler, connections between the pistons and thedriving-wheels of the locomotive, the upper loco-motive-cab.

ALFRED GIVEN.

portion of the cylinder being extended to the \Vitnesses: smoke-box andsuch portion of the cylinder l R. B. WILSON, having two sets of feed andexhaust ports 1 H. DARBY.

